McKenzie Health System in Michigan was targeted by Avos Locker threat actors and they listed them on their leak site.
The files leaked on their leak site contained health insurance information and other protected health information of its 25,318 patients.
McKenzie mailed notification letters to the affected patients and uploaded a notice to their website.
Source: https://www.databreaches.net/five-ransomware-groups-five-victims-will-it-ever-ease-up/
TPRM report: https://www.rankiteo.com/company/mckenzie-health-system
"id": "mck231015822",
"linkid": "mckenzie-health-system",
"type": "Ransomware",
"date": "6/2017",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"{'affected_entities': [{'customers_affected': '25,318',
'industry': 'Healthcare',
'location': 'Michigan',
'name': 'McKenzie Health System',
'type': 'Healthcare'}],
'attack_vector': 'Ransomware',
'customer_advisories': 'mailed notification letters to the affected patients',
'data_breach': {'data_exfiltration': True,
'number_of_records_exposed': '25,318',
'personally_identifiable_information': True,
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['health insurance information',
'protected health information']},
'description': 'McKenzie Health System in Michigan was targeted by Avos '
'Locker threat actors and they listed them on their leak site. '
'The files leaked on their leak site contained health '
'insurance information and other protected health information '
'of its 25,318 patients.',
'impact': {'data_compromised': ['health insurance information',
'protected health information']},
'motivation': 'Data Theft',
'ransomware': {'data_exfiltration': True, 'ransomware_strain': 'Avos Locker'},
'response': {'communication_strategy': ['mailed notification letters to the '
'affected patients',
'uploaded a notice to their website']},
'threat_actor': 'Avos Locker',
'title': 'McKenzie Health System Data Breach',
'type': 'Data Breach'}